jupyterlab-git excluded_paths Case-Sensitivity Bypass Allows Reading Excluded Directories
Priority MEDIUM 64CWE-178Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat.
Summary
JupyterLab Git is a Git extension for JupyterLab. Prior to 0.54.0, jupyterlab-git uses fnmatch.fnmatchcase() in GitHandler.prepare() in jupyterlab_git/handlers.py to enforce excluded_paths, allowing an authenticated user on a case-insensitive filesystem to vary URL path casing and read excluded directories. This issue is fixed in version 0.54.0.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00411 35th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial jupyterlab-git (jupyterlab): 0.54.0jupyterlab-git (PyPI): 0.54.0Red Hat: 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| jupyterlab | jupyterlab-git | before 0.54.0 | 0.54.0 | Patch available | CNA |
| — | jupyterlab-git (PyPI) | before 0.54.0 | 0.54.0 | Patch available | GHSA-436q-jwfr-rm2h |
- jupyterlab-git Vendorjupyterlab Affected before 0.54.0 Fixed in 0.54.0 Patch available CNA
- jupyterlab-git (PyPI) Vendor— Affected before 0.54.0 Fixed in 0.54.0 Patch available GHSA-436q-jwfr-rm2h
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:jupyter:jupyterlab-git:*:*:*:*:*:*:*:* | before 0.54.0 | Vulnerable | jupyterlab |
- cpe:2.3:a:jupyter:jupyterlab-git:*:*:*:*:*:*:*:* Versions before 0.54.0 Vulnerable ·jupyterlab
Remediation
- Fix · CNA jupyterlab-git (jupyterlab) Fixed in 0.54.0
- Fix · GHSA-436q-jwfr-rm2h jupyterlab-git (PyPI) Fixed in 0.54.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-54528
- 2026-10-03 Alias added: GHSA-436q-jwfr-rm2h
References
More Jupyterlab-git vulnerabilities
- TI-2026-39372 JupyterLab Git: Stored XSS leading to RCE CVSS 4.0CRITICAL 9.3
Sources
- CVE-2026-54528 · CVE Program
- CVE-2026-54528 · NVD
- FIRST EPSS
- GHSA-436q-jwfr-rm2h · GitHub Advisory Database · CC BY 4.0
- CVE-2026-54528 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences